code: def testRegression(self):
      input = readVector(join(testdir, "regression-input.txt"))
      expected = readVector(join(testdir, "regression-output.txt"))
  
      output = WarpedAutoCorrelation(maxLag=len(input) - 1)(input)
  
      self.assertAlmostEqualVector(expected, output, 1e-4)
  
file_path: essentia/test/src/unittests/stats/test_warpedautocorrelation.py
imports: from essentia_test import *
label_desc: Use image node_id 3 for calling the TestWarpedAutoCorrelation obj's underlying member method code with example usage: obj.testRegression() without return types